Scan Tool Data List

Diagnostic Chart:

Data List

Use the Typical Scan Data Values table only after the Powertrain On-Board Diagnostic System Check has been completed, no DTC(s) were noted and you have determined the on-board diagnostics are functioning properly. Scan tool values from a properly running engine may be used for comparison with the engine you are diagnosing. The Typical Scan Data values represent values that would be seen on a normally running engine.

Important: A scan tool that displays faulty data should not be used, and the problem should be reported to the scan tool manufacturer. Use of a faulty scan tool can result in misdiagnosis and unnecessary parts replacement.

Only the parameters listed below are referred to in this database for use in diagnosis. For further information on using the scan tool to diagnose the PCM and related sensors, refer to the applicable reference section listed below. If all values are within the typical range described below, refer to Symptoms section for diagnosis. The Typical Scan Data Values table contains all the parameters included in the following data lists arranged in alphabetical order:

Engine Data

^ ENG 1 - Contains general information regarding fuel delivery and basic engine operating conditions.

^ ENG 2 - Contains general information regarding IC, KS, A/C, and basic engine operating conditions.

Specific Engine Data

^ EGR - Contains information specific to the Exhaust Gas Recirculation system flow diagnostics and the EGR valve pintle position sensor diagnostics. Also displays parameters required to verify proper EGR system operation.

^ [1][2]EVAP - Contains information specific to the EVAP system diagnostics. Also displays parameters required to verify proper EVAP system operation.

^ CATALYST - Contains information specific to the TWC diagnostics and parameters required to verify proper TWC system operation.

^ HO2S - Contains information specific to the Heated Oxygen Sensor diagnostics and parameters required to verify proper HO2S operation.

^ MISFIRE - Contains information specific to the misfire diagnostics and parameters required to verify proper operation with regard to misfire.